The song that Clair dances to is "Twist And Shout" by The Isley Brothers.
In another episode, Cliff says the room will be finished in November. However, this episode is aired in December and the room is said to be finished early.
When Cliff sends the children outside to view the Christmas lights and tells them to go across the street to get the full effect, they appear to walk straight across the street; but as has been shown in previous episodes (such as Theo's Holiday, The Card Game and An Early Spring) in addition to exterior shots, the Huxtables' brownstone has a six-step stoop preceding the front door. Why didn't the kids go down the stairs?
We find out in this episode that Sara, Clair's sister who hasn't been seen since Season 3, lives in Denver and has a son named Daniel.
In this episode, it is noted that Theo has low blood sugar.